Middle buffering bag of molten aluminum launder

Abstract

The utility model relates to a molten aluminum launder intermediate buffer ladle in the technical field of aluminum ingot casting, which is characterized in that a cover body is arranged at the top of a tundish tank body, a filter cavity and an aluminum outlet cavity are arranged in the tundish tank body, a liquid inlet is arranged on the front side of the filter cavity, an aluminum outlet is arranged on the rear side of the aluminum outlet cavity, and a fireproof wall is arranged between the filter cavity and the aluminum outlet cavity. A circulating opening with a filter screen is formed in the fire-resistant wall; a discharge outlet is formed in the bottom of the aluminum outlet cavity, a sealing plug is inserted into the discharge outlet, and the outer end of the sealing plug is connected with a pneumatic switch assembly used for controlling the opening and closing action of the sealing plug. The side walls, corresponding to the filtering cavity and the aluminum discharging cavity, of the cover body are each provided with a burner assembly used for conducting heating and heat preservation on molten aluminum in the filtering cavity and the aluminum discharging cavity. Through the structural design that the tundish is divided into the two cavities, the filtering cavity can separate molten aluminum dross, the aluminum discharging cavity can pneumatically control discharging of molten aluminum, the two cavities are provided with combustor auxiliary heating and heat preservation configurations, and the problems of molten aluminum slagging and solidification of the tundish under the emergency situation can be solved.

Description

Technical Field

[0001] The utility model belongs to the technical field of aluminum ingot casting, and particularly relates to an aluminum liquid flow channel intermediate buffer bag. Background Art

[0002] Aluminum ingot casting involves melting aluminum ore or crushed recycled aluminum into molten aluminum in a smelting furnace. The aluminum is then evenly poured into the forming mold of the ingot casting machine through a distribution hub, cooled, and formed. The molten aluminum is then released from the mold after cooling. A chute is used to transport the molten aluminum from the smelting furnace to the distribution hub. An intermediate buffer ladle (or tundish) is typically located in the middle of the chute to temporarily buffer the molten aluminum. The existing tundish is a relatively simple rectangular open tank slightly wider and deeper than the chute. If economic conditions necessitate a prolonged pause in the flow of molten aluminum, such as a malfunction of the downstream distribution hub or the ingot casting machine, the surface temperature of the molten aluminum in the tundish drops rapidly, causing slagging. The molten aluminum may even solidify in the lower portion, impacting the subsequent use of the tundish and the production efficiency of the aluminum ingots. To prevent the inconvenience of cleaning the tundish caused by solidified aluminum, the molten aluminum must be drained promptly in such emergencies. However, manual draining poses certain safety risks for workers. Therefore, it is necessary to improve the existing tundish or design a new tundish structure to solve the above problems. Utility Model Content

[0003] In view of the above situation, the utility model provides an aluminum liquid flow channel intermediate buffer ladle, which can well solve the problem of aluminum liquid slagging and aluminum liquid solidification in the existing ladle in an emergency situation.

[0004] In order to achieve the above objectives, the present invention adopts the following technical solutions:

[0005] A tundish buffer ladle for an aluminum liquid flow trough comprises a tundish body provided with a refractory layer, a thermal insulation layer and an outer shell layer in sequence from the inside to the outside, the top of the tundish body is provided with an openable and closable cover body, and the cover body is also provided with a refractory layer, a thermal insulation layer and an outer shell layer in sequence from the inside to the outside; according to the flow direction of the aluminum liquid, a filter chamber and an aluminum discharge chamber are provided on the front and rear sides of the interior of the tundish body respectively, the front side of the filter chamber is provided with a liquid inlet, the rear side of the aluminum discharge chamber is provided with an aluminum discharge port, a refractory wall is provided between the filter chamber and the aluminum discharge chamber, a flow port connecting the filter chamber and the aluminum discharge chamber is provided on the refractory wall; a discharge port is provided on one side of the bottom of the aluminum discharge chamber, an openable and closable sealing plug is inserted in the discharge port, and the outer end of the sealing plug is connected to a pneumatic switch assembly for controlling the opening and closing action of the sealing plug; a set of burner assemblies are respectively installed on the side walls of the cover body corresponding to the filter chamber and the aluminum discharge chamber, which are used to heat and keep the aluminum liquid in the filter chamber and the aluminum discharge chamber respectively.

[0006] Furthermore, the pneumatic switch assembly includes a tilt lever and a driving cylinder, the lower end of the tilt lever is connected to the outer end of the sealing plug, the middle part of the tilt lever is rotatably connected to the outer wall of the intermediate ladle tank body through a bearing seat, the upper end of the tilt lever is rotatably connected to the piston rod of the driving cylinder, and the cylinder base of the driving cylinder is rotatably connected to the outer wall of the intermediate ladle tank body.

[0007] Furthermore, the burner assembly includes a gas burner and an air-cooling sleeve, the gas burner is fixedly mounted on the side wall of the cover body, the flame-spraying end of the gas burner is inserted into the inner side of the refractory layer of the cover body, the upper side wall of the gas burner is connected to a gas inlet pipe, the outer end of the gas burner is connected to an air inlet pipe, and an ignition needle is installed below the side wall of the gas burner; the air-cooling sleeve jacket is arranged on the air inlet pipe, the side wall of the air-cooling sleeve is connected to the air inlet pipe, the side wall of the air inlet pipe is provided with an air inlet connected to the air-cooling sleeve, and the outer end of the air inlet pipe is also installed with an ultraviolet probe for detecting the temperature of the aluminum liquid and the flame conditions in the tundish tank body.

[0008] Furthermore, a thermocouple temperature sensor is provided on the top of the cover body for detecting the temperature of the aluminum liquid inside the tundish tank body.

[0009] Furthermore, the top and bottom of the fire-resistant wall are respectively provided with flow openings, and filter screens are respectively provided in the flow openings.

[0010] Furthermore, the bottom of the filter cavity is higher than the bottom of the aluminum discharge cavity, and the bottom of the filter cavity is also provided with a slope inclined toward the aluminum discharge cavity.

[0011] Furthermore, a plurality of lifting ears are fixedly connected to the top of the cover body to facilitate the opening, closing and lifting operations of the cover body.

[0012] Furthermore, the gas inlet pipe of the gas burner is externally connected to a burner solenoid valve for controlling its gas supply, the driving cylinder of the sealing plug is externally connected to a plug solenoid valve for controlling its compressed air, the UV probe, thermocouple temperature sensor, burner solenoid valve, ignition needle, plug solenoid valve and blower are all electrically connected to the main control cabinet of the ingot casting machine, and the combustion control of the gas burner and the switching action of the sealing plug are interlocked with the main operation of the ingot casting machine.

[0013] The present invention also includes other components that enable it to be used normally, which are all conventional means in the field. In addition, devices or components not limited in the present invention, such as: gas burner, ignition needle, air cooling sleeve, UV probe, sealing plug, drive cylinder, etc., all adopt the existing technology in this field.

[0014] The beneficial effects of the utility model are as follows:

[0015] The utility model provides an intermediate buffer ladle of the aluminum liquid flow trough, which adopts a structural design method of dividing the interior of the ladle into two chambers. The filter chamber can separate the slag on the surface of the aluminum liquid, and the aluminum discharge chamber has the function of pneumatically controlling the discharge of the aluminum liquid. At the same time, both chambers are also equipped with burners for auxiliary heating and heat preservation, which can effectively avoid the problems of aluminum liquid slagging and aluminum liquid solidification in the ladle in emergency situations, improve the safety of aluminum ingot casting, and ensure the aluminum ingot production efficiency of the ingot casting machine. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 Schematic diagram of the structure of the intermediate buffer bag of the aluminum liquid flow channel in the embodiment.

[0017] Figure 2 for Figure 1 Schematic diagram of the cross-sectional structure along the AA direction. DETAILED DESCRIPTION

[0018] The technical solutions of the present invention will be clearly and completely described below in conjunction with specific embodiments. Obviously, the described embodiments are only some embodiments of the present invention, rather than all embodiments.

[0019] Example

[0020] like Figures 1-2 As shown, a tundish for an aluminum molten launder comprises a tundish body, which is sequentially provided with a refractory layer 1, a thermal insulation layer 2, and an outer shell 3 from the inside out. A retractable lid 4 is provided on top of the tundish body. Like the tundish body, the lid is also sequentially provided with a refractory layer, a thermal insulation layer, and an outer shell from the inside out. Four lifting lugs 5 are fixedly attached to the four corners of the lid. The refractory layer, thermal insulation layer, and outer shell are all conventional, and their specific configurations are not described in detail here.

[0021] According to the flow direction of the aluminum liquid, a filter chamber 6 and an aluminum discharge chamber 7 are respectively provided on the front and rear sides of the tundish tank body. A liquid inlet 8 is provided on the front side of the filter chamber, and an aluminum discharge port 9 is provided on the rear side of the aluminum discharge chamber. The front end of the liquid inlet and the rear end of the aluminum discharge port are both connected to an aluminum liquid flow trough (not shown in the figure). The bottom of the filter chamber is higher than the bottom of the aluminum discharge chamber, and the bottom of the filter chamber is also provided with a slope 10 that is gently inclined toward the aluminum discharge chamber. A refractory wall 11 is provided between the filter chamber and the aluminum discharge chamber. A flow port is respectively provided at the top and bottom of the refractory wall. A filter screen 12 is respectively provided in each of the two flow ports to intercept a small amount of surface slag and impurity precipitation in the aluminum liquid, but does not affect the flow of the aluminum liquid.

[0022] A discharge port 27 is provided on one side of the bottom of the aluminum discharge chamber, and an openable and closable sealing plug 13 is inserted into the discharge port. The outer end of the sealing plug is connected to a pneumatic switch assembly for controlling the opening and closing of the sealing plug; a set of burner assemblies are respectively installed on the side walls of the cover corresponding to the filter chamber and the aluminum discharge chamber, which are used to heat and keep the aluminum liquid in the filter chamber and the aluminum discharge chamber respectively.

[0023] The pneumatic switch assembly includes a tilt lever 14 and a driving cylinder 15. The lower end of the tilt lever is connected to the outer end of the sealing plug through a damping ball joint structure. The middle part of the tilt lever is rotatably connected to the outer wall of the intermediate ladle tank body through a bearing seat 16. The upper end of the tilt lever is rotatably connected to the piston rod of the driving cylinder, and the cylinder base of the driving cylinder is rotatably connected to the outer wall of the intermediate ladle tank body.

[0024] The burner assembly includes a gas burner 17 and an air cooling sleeve 18. The gas burner is fixedly mounted on the side wall of the cover body, and the flame spraying end 19 of the gas burner is inserted into the inner side of the refractory layer of the cover body. The upper side wall of the gas burner is connected to a gas inlet pipe 20, the outer end of the gas burner is connected to an air inlet pipe 21, and an ignition needle 22 is installed below the side wall of the gas burner; the air cooling sleeve is a four-way sleeve with a diameter larger than the diameter of the air inlet pipe. The two ends of the air cooling sleeve are sealed and welded coaxially on the air inlet pipe. The side wall of the air cooling sleeve is connected to an air inlet pipe 23, and the air inlet pipe is externally connected to the The blower (not shown) has an air inlet 24 on the side wall of the air inlet pipe, which is connected to the interior of the air cooling jacket and is used to blow air to the gas burner end. A UV probe 25 is also installed on the outer end of the air inlet pipe to detect the temperature of the molten aluminum in the tundish tank and the combustion status of the gas burner flame. The top of the cover is equipped with a thermocouple temperature sensor to detect the temperature of the molten aluminum inside the tundish tank. The air cooling jacket also has an air outlet 26 on the side wall to exhaust excess air from the air cooling jacket, thereby achieving air cooling of the air inlet pipe and protecting the UV probe. The gas burner, UV probe, and thermocouple temperature sensor all adopt existing technology, and the specific configuration is not detailed here.

[0025] The gas inlet pipe of the gas burner is externally connected to a burner solenoid valve that controls its gas supply, and the driving cylinder of the sealing plug is externally connected to a plug solenoid valve that controls its compressed air. The UV probe, thermocouple temperature sensor, burner solenoid valve, ignition needle, plug solenoid valve, and blower are all electrically connected to the main control cabinet of the ingot casting machine. The combustion control of the gas burner and the opening and closing of the sealing plug are interlocked with the operation of the main machine of the ingot casting machine. The ignition of the gas burner can be interlocked and controlled based on the temperature of the molten aluminum inside the tundish tank detected by the thermocouple temperature sensor. When the main machine of the ingot casting machine is turned on and running, the driving cylinder of the sealing plug is interlocked to close the discharge port at the bottom of the aluminum discharge cavity to prevent leakage of molten aluminum. When the main machine of the ingot casting machine is shut down in an emergency, the driving cylinder is interlocked to control the opening of the sealing plug, discharging the molten aluminum in the tundish tank into an external emergency aluminum connection barrel, thereby preventing the molten aluminum from being retained in the tundish tank for a long time and cooling, thereby causing slagging and solidification. The burner solenoid valve, plug solenoid valve, main control cabinet of the ingot casting machine and its internal control circuit, etc. all adopt the existing technology in this field, and the specific settings will not be described in detail here.

[0026] The technical solution of the present invention is not limited to the above-mentioned specific embodiments. Without departing from the scope and spirit of the described embodiments, many modifications and changes are obvious to ordinary technicians in this technical field. Any technical deformation made within the spirit and principles of the present invention falls within the scope of protection of the present invention.

Claims

1. A tundish for aluminum liquid launder, comprising a tundish body having, from the inside out, a refractory layer, a thermal insulation layer, and an outer shell layer, characterized in that: The top of the tundish tank body is provided with an openable and closable cover body, and the cover body is also provided with a refractory layer, a thermal insulation layer and an outer shell layer in sequence from the inside to the outside. According to the flow direction of the molten aluminum, a filter chamber and an aluminum outlet chamber are provided on the front and rear sides of the tundish tank body respectively. The front side of the filter chamber is provided with a liquid inlet, and the rear side of the aluminum outlet chamber is provided with an aluminum outlet. A refractory wall is provided between the filter chamber and the aluminum outlet chamber, and a flow port connecting the filter chamber and the aluminum outlet chamber is provided on the refractory wall; a discharge port is provided on one side of the bottom of the aluminum outlet chamber, and an openable and closable sealing plug is inserted in the discharge port, and the outer end of the sealing plug is connected to a pneumatic switch assembly for controlling the opening and closing action of the sealing plug; a set of burner assemblies are respectively installed on the side walls of the cover body corresponding to the filter chamber and the aluminum outlet chamber, for heating and keeping the aluminum liquid in the filter chamber and the aluminum outlet chamber warm.

2. The aluminum liquid launder intermediate buffer ladle according to claim 1, characterized in that: The pneumatic switch assembly includes a tilt lever and a driving cylinder. The lower end of the tilt lever is connected to the outer end of the sealing plug. The middle part of the tilt lever is rotatably connected to the outer wall of the intermediate ladle tank body through a bearing seat. The upper end of the tilt lever is rotatably connected to the piston rod of the driving cylinder. The cylinder base of the driving cylinder is rotatably connected to the outer wall of the intermediate ladle tank body.

3. The aluminum liquid launder intermediate buffer ladle according to claim 1, characterized in that: The burner assembly includes a gas burner and an air cooling sleeve. The gas burner is fixedly mounted on the side wall of the cover body, the flame-spraying end of the gas burner is inserted into the inner side of the refractory layer of the cover body, the upper side wall of the gas burner is connected to a gas inlet pipe, the outer end of the gas burner is connected to an air inlet pipe, and an ignition needle is installed below the side wall of the gas burner; the air cooling sleeve jacket is arranged on the air inlet pipe, the side wall of the air cooling sleeve is connected to the air inlet pipe, the side wall of the air inlet pipe is provided with an air inlet connected to the air cooling sleeve, and the outer end of the air inlet pipe is also installed with an ultraviolet probe.

4. The aluminum liquid launder intermediate buffer ladle according to claim 1, characterized in that: A thermocouple temperature sensor is provided on the top of the cover.

5. The aluminum liquid launder intermediate buffer ladle according to claim 1, characterized in that: The top and bottom of the fireproof wall are respectively provided with flow openings, and filter screens are respectively provided in the flow openings.

6. The aluminum liquid launder intermediate buffer ladle according to claim 1, characterized in that: The bottom of the filter cavity is higher than the bottom of the aluminum discharge cavity, and the bottom of the filter cavity is also provided with a slope toward the aluminum discharge cavity.

7. The aluminum liquid launder intermediate buffer ladle according to claim 1, characterized in that: A lifting lug is fixedly connected above the cover body.

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